Title: A Lecture on High-Throughput Sequencing Using a Specific Scenario and Clicker Questions Jenifer Cruickshank Affiliations: State University of New York at Oswego, Oswego, New York Type of Manuscript: CourseSource Lesson Manuscript Funding & Conflict of Interest Statement: Sources of outside support for the creation of the resource must be named in the contributed manuscript. If funding is related to a potential conflict of interest, include the funding information here. Conflict of interest exists when an author, reviewer or editor has financial, personal, or professional relationships that could inappropriately bias or compromise his or her actions. For example, if the authors of a Lesson are assessing the effectiveness of the Lesson, a conflict of interest exists. The presence OR absence of perceived conflicts must be addressed on a Conflict of Interest Notification on the manuscript’s title page. List of Tables, Figures and Supplemental Material: Please list the Figures, Tables and Supplemental materials associated with the Lesson. Title and Description of Primary Image: We ask that an image be submitted with the manuscript that represents the information in the article (e.g. a picture of a dividing cell for a Lesson about mitosis or a picture taken of students doing the activity). This image will be displayed with the title of your article on the CourseSource website. If you do not have a primary image, the editorial staff will select one that best fits your article. Please be conscientious of the copyright associated with any image used in your Lesson! 1 Abstract Page The abstract should be a single paragraph of 250 words or less. Start with an opening sentence that sets the teaching challenge that you address in this manuscript, provide background information specific to this Lesson, briefly description the Lesson, and end with a concluding sentence. 2 Article Context Page: To make the submission process easier, you may want to fill out the following form, (you will be asked to select answers during the submission process). Choose all applicable options that effectively describe the conditions IN WHICH THE LESSON WAS TAUGHT. Modifications to expand the usability of the Lesson will be addressed later in the text. **Please delete this page prior to submission. **Not all categories will pertain to your article, in those cases, please select ‘N/A’ when submitting on the website. Course o o o o o o o Lesson Length o Portion of one class period o One class period o Multiple class periods o One term (semester or quarter) o One year o Other Key Scientific Process Skills o Reading research papers o Reviewing prior research o Asking a question o Formulating hypotheses o Designing/conducting experiments o Predicting outcomes o Gathering data/making observations o Analyzing data o Interpreting results/data o Displaying/modeling results/data o Communicating results Pedagogical Approaches o Think-Pair-Share o Brainstorming o Case Study o Clicker Question o Collaborative Work o One Minute Paper o Reflective Writing o Concept Maps o Strip Sequence o Computer Model o Physical Model o Interactive Lecture o Pre/Post Questions o Other Bloom’s Cognitive Level (based on learning objectives & assessments) o Foundational: factual knowledge & comprehension o Application & Analysis o Synthesis/Evaluation/Creation Biochemistry Cell Biology Developmental Biology Genetics Microbiology Molecular Biology Introductory Biology Course Level o Introductory o Upper Level o Graduate o High School o Other Class Type o Lecture o Lab o Seminar o Discussion Section o On-line o Other Audience o Life Sciences Major o Non-Life Science Major o Non-Traditional Student o 2-year College o 4-year College o University o Other Class Size o 1 – 50 o 51 – 100 o 101+ 3 Principles of how people learn o Motivates student to learn material o Focuses student on the material to be learned o Develops supportive community of learners o Leverages differences among learners o Reveals prior knowledge o Requires student to do the bulk of the work Vision and Change Core Concepts o Evolution o Structure and Function o Information flow, exchange and storage o Pathways and transformations of energy and matter o Systems Vision and Change Core Competencies o Ability to apply the process of science o Ability to use quantitative reasoning o Ability to use modeling and simulation o Ability to tap into the interdisciplinary nature of science o Ability to communicate and collaborate with other disciplines o Ability to understand the relationship between science and society Key Words: List 3 – 10 key words that are relevant for the Lesson (e.g. mitosis; meiosis; reproduction; egg; etc.) o o o o o o o o o o 4 Scientific Teaching Context Page Learning Goal(s): Students will understand the basic processes of next-generation sequencing (NGS) and sequence analysis. Students will appreciate what kinds of research questions can be answered with information garnered from NGS data. Provide clearly stated learning goals, which are broad statements of what the students will know once they have completed the Lesson. Learning goals are typically rather abstract and use words like “know,” “understand”, “appreciate,” or “demonstrate”. For example: Students will understand the steps in mitosis. Students will appreciate the importance of mitosis in the process of reproduction. Learning Objective(s): Choose an appropriate sequencing technology for a particular research question. Define the types of differences one would look for when comparing two genome sequences. Define what students who have successfully accomplished the learning goal can actually do. Learning objectives describe student behaviors that are observable, measurable, and testable. Learning objectives should test students’ mastery of the material and use words like “define”, “predict”, “design” and “evaluate.” For example: Compare and contrast mitosis and meiosis. Predict consequences of abnormal meiosis. 5 Main Text Begin the Lesson text on a new page. Include the following sections: 1. Introduction: This lesson is intended to introduce students to next-generation sequencing (NGS) technologies, the types of data NGS generates, and why one would be interested in large-scale sequence information. The set-up of the lesson is a clicker-based lecture that will present a scenario at the start of class that progresses (virtually) through (re)sequencing, assembling, and analyzing a eukaryotic genome, then comparing the newly-generated genome to the pre-existing genome sequence of a closely-related species. This lesson is intended for one lecture period (80 minutes) in a Genetics course. Enrolled students are primarily second and third year undergraduate biology and zoology majors with a smaller proportion of biochemistry majors. This class period would be late in the semester when students should have a solid understanding of DNA structure, what a gene is, eukaryotic gene structure, and basic principles of evolution. Students will prepare specifically for this lecture by reading several relevant sections on genomics in the course textbook and by watching several online videos on different sequencing techniques (Sanger, Illumina, NanoPore?) The introduction should provide the origin and rationale for the design of the Lesson and provide enough background information to allow the reader to evaluate the Lesson without referring to extensive outside material. For complex topics, a Science Behind the Lesson article may be simultaneously submitted with the Lesson, so that potential instructors will have sufficient information to implement the Lesson. The introduction should also explain: Intended Audience: Describe the intended student population for the Lesson, including level and major affiliation. For example: first-year students, biology majors, non-majors, advanced biology students, etc. Learning time: Indicate the approximate class or lab time required for the Lesson, keeping in mind potential alternate Lesson timelines that may also be described in the modifications section. Pre-requisite student knowledge: Describe the knowledge and skills that students should have before using this Lesson. Prerequisite knowledge may include both science process skills and background content knowledge. 2. Scientific Teaching Themes: Active Learning: Students will actively engage with the material with clicker questions, which will be of the “What should be our next step?” variety. A clicker question will be posed, students will answer without discussion. Assuming a small minority answer correctly, a mini-lecture on the subtopic will be presented followed by student discussion with a neighbor then a reposing of the question. There will be a homework question asking for another specific application of highthroughput sequencing. Assessment: The clicker questions will provide an assessment of students’ own learning in addition to assessment information for the instructor. A homework assignment after the class will ask student to expand beyond the specific example from the lecture. Subsequent exams will include questions over the material covered in this lecture. 6 Inclusive Teaching: Answers to clicker questions are anonymous and allow full participation by students regardless of their level of extroversion. The follow-up homework question allows students to identify an application of high-throughput sequencing that is of interest to them. Explain how the Lesson relates to the Scientific Teaching Themes of: Active Learning: How will students actively engage in learning the concepts? List and/or explain the active learning strategies that are used in the Lesson. For example, activities could include think-pair-share, clicker questions, group discussion, debate, etc. Include both inclass and out-of-class activities. Assessment: How will teachers measure learning? How will students self-evaluate their learning? List and/or explain the kinds of assessment tools used to measure how well students achieved the learning objectives. For example, assessments might be clicker questions, forced choice questions, exams, posters, etc. Inclusive Teaching: How is the Lesson designed to include all participants and acknowledge the value of diversity in science? List and/or explain how the Lesson is inclusive and how it leverages diversity in the classroom and beyond. For example, the lesson may use multiple senses and provide examples of scientists from different backgrounds. 3. Lesson Plan: Pre-class preparation: Because of the lengthy run times for most eukaryotic genome analysis software programs, all necessary analyses will have already been done and be accessible during class. In this case, it is whole genome sequence from a yak. Access to the internet during class is also necessary. Visual lecture information and clicker questions will be presented on PowerPoint slides. In-class: The set-up: A rich hobby farmer wants to know if the yak (Bos grunniens) bull she just purchased is pure yak or whether he has any cattle (Bos taurus) in his pedigree. She is willing to pay for any needed “DNA tests” to answer this question. Clicker question 1: What would be good to know at this point? (Granted, this one is a bit of a gimme.) A. Is yak genome information available? B. Is cattle genome information available? C. Can we see a picture of the bull? D. Both A and B would be good to know. Presumably, D is chosen by a large majority which prompts an internet source by the instructor for “yak genome” and “cattle genome”. The yak genome search should turn up the Yak Genome Database, and there are multiple options for the cattle genome, I would go with Ensembl. Information from the front page of the Yak Genome Database notes the size of the genome (2657 Mb) and that coverage is 65X, prompting Clicker question 2: What does 65X coverage mean? A. Every base is present 65 times in the yak sequence data. B. On average, a given base is present 65 times in the yak sequence data. C. 65 yak genomes were sequenced. D. 65% of the yak genome is included in this yak sequence data. Presumably, B is not chosen by a large majority which prompts a minilecture on the process of high-throughput sequencing with examples of Illumina and NanoPores(?). Repose clicker question 2. Continue the narrative, we get a blood sample from the yak and extract the DNA (it’s really good quality). Now what? 7 Clicker question 3: What do we do with the DNA? A. Sequence the mRNAs from this blood sample. B. Sequence the DNA on an Illumina platform. C. PCR a few genes and run the PCR products on a gel. D. Sequence the mtDNA. Depending on how students answer, briefly review high-throughput sequencing and discuss incorrect answers. Continue the narrative: we prepare and send the DNA away for sequencing. Show what the data files look like when they come back. Clicker question 4: What should we do with this data first? A. Assemble the sequences into contigs. B. Blast the sequences against the database. C. Assemble the sequences into one long DNA sequence. D. Assess the quality of the sequences. Presuming a majority do not correctly choose D, give a mini-lecture on how sequencing errors can arise and how they can be identified (phred scores and kmer graphs). Repose clicker question 4. (Yet to be completed.) Continue along through genome assembly, gene annotation, and comparative genomics. The final clicker question may be what parts of the genome should we compare to find out if the yak bull has cattle DNA. Certain genes? coding sequence? introns? SNPs? Followed by discussion on that topic. Provide a detailed description of the Lesson that is sufficiently complete and detailed to enable another teacher to replicate it. You may need/want to include subsections such as: pre-class preparation and in-class script. A Table containing a recommended timeline for the class should be included. As needed, expand upon aspects of scientific teaching that are particularly highlighted in the Lesson. As appropriate, provide examples of formative and/or summative assessments and related rubrics. List materials that are necessary or useful for teaching the Lesson, whether they are provided as supplementary materials or as links to other websites. 4. Teaching Discussion: Data unavailable at this time. Share your observations about the Lesson’s effectiveness in achieving the stated learning goals and objectives, student reactions to the Lesson, and your suggestions for possible improvements or adaptations to different courses or student populations. Subheadings: can be included within the sections above to increase readability and clarity. 8 Acknowledgments Begin the Acknowledgements on a new page. The acknowledgements can be multiple paragraphs. 9 References Begin the References on a new page. * Cite references in the text using superscript Arabic numbers. Use commas to separate multiple citation numbers. Superscript numbers are placed outside periods and commas and inside colons and semicolons. 1. Begin the reference list on a new page. The reference list is comprehensive and spans the text, figure captions and materials. 2. Number references in the order in which they appear in the text. Follow ASM style and abbreviate names of journals according to the journals list in NCBI. List all authors and/or editors up to 6; if more than 6, list the first 3 followed by “et al.” Note: Journal references should include the issue number in parentheses after the volume number. Examples of reference style: 1. Knight JK, Wood WB. 2005. Teaching more by lecturing less. Cell Biol Educ. 4(4):298-310. 2. Samford University. How to get the most out of studying: A video series. www.samford.edu/how-to-study/. Accessed August 20, 2013. 3. Handelsman J, Miller S, Pfund C. 2006. Scientific Teaching. New York, NY:W.H. Freeman. 3. Please add notes to the end of the reference list; do not mix in references with explanatory notes. 10 Figure and Table Legends Begin legends on a new page. * The actual figures, tables, and supplemental materials are uploaded as separate documents and should not be included in this text file. Tables: Table 1. Table legends should contain a short description of the table. Figures: Figure 1. The figure legend should begin with a sentence that describes the overall “take home message” of the figure. Figure parts are indicated with capital letters (A). Supplementary Materials: (Follow descriptions for Tables and Figures, listed above.) Tables S1-S# Figures S1-S# Presentations S1-S# Text Documents S1-S# Movies S1-S# Audio Files S1-S# External Databases S1-S# 11